What is the difference of finding my android fragments view in these way ?

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Android

first code

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_a, container, false);
    listView = view.findViewById(R.id.listview);
    return view;
}

second code

  @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);


         listView = getActivity().findViewById(R.id.listview);
}

* some people say the second one get the views from activity, but i used it to get views inside fragment(that didn't exists in activity) and it worked fine, so what is the difference ?

What I have tried:

there was nothing i could do !